g-rudelbach



(No Model.)

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6:: A q:3 WITNESSES? N. PEYERS. Fhnlwlilhagraphor. Wanhinghm. D. c.

P. GRUDELBACH.

GUT-OFF VALVE GE AR.

Patented Mar.6,188'3.

2 SheetsSheet 1.

1 NVENTOR d7"; ZeZZMA ATTORNEYS (No Model.) 2 Sheets-Sheet 2.

P. GRUDELBAGH' GUT-OFF VALVE GEAR.

No. 273,512. Patented Mar.6,1883.

Y INVENTOR Pauz d7 BY I WITNESSES:

ATTORNEYS 7 UNITED STATES PATEN OF-FICEQ PAUL GRUDELBAOH, OF BERLIN,ASSIGNOR TO SOHAEFFER 85 BUDENBERG, OF BUOKAU, NEAR MAGDEBURG, GERMANY.

CUT-,OFF-VALVE GEAR.

SPECIFICATION forming part of Letters Patent No. 273,512,.dated March 6,I883.

' Application filed December 21, 1882. (No model.)

To all whom it may concern:

Be it known that I, PAUL GRiiDELBAoH, a subject of the Kingdom ofPrussia, German Empire, residing at Berlin, Prussia, have invented a newand useful Improvement in Out- OfflValve Gear, of which the following isa specification.

This invention relates to agovernor, theregulation or governing beingaccomplished by a 10 cut-ofi' automatically set by the governor, and theapparatus operates in such a manner that at the beginning of the strokethe steam is allowed to flow into the valve-chest with full pressure,and it is cut off sooner or later, according to the lower or higherposition of the regulator. The operation of the governor is thus similarto that in steam-engines with ate tomatically-changing cut-oil",excepting in regard tothe fact that the steam in the valvechest haspartially to expand twice for each revolution of the machine.

The construction in which this apparatus chiefly differs from otherapparatuses tor the same purpose is shown in the accompanying drawings,in which- Figure 1 isa vertical central section. Fig. 2 is a plan view,partly in section. Fig. 3 is an end view, in section, of the valve. Fig.at is an enlarged view of part of Fig.1. Fig. 5 is 0 an end View,enlarged, of part of the apparatus.

Similar letters indicate corresponding parts.

The steam flows from the boiler. through the casing A into thevalve-chest either in the diiectiou from a to b or from b to a.

5 B is an oscillatory rotary valve, which is mounted on a spindle, 8.Upon this spindle s is firmly keyed or mounted a segment, S, againstwhich strike spring arms or levers .r 00. These levers w 00 each consistof two branches, one of which strikes against a fixed part of themachine, thus limiting the motion in one direction. The other branch iscaused to strike against the segment S by means of a spring or weight,thus holding the segment S, and 4 5 consequently the valve B,in acertain position, and the valve is closed. In the view shown in thedrawingszcoiled springs are shown mounted on the brackets on which thepivots about which the levers or w oscillate are formed, and one end ofeach spring catches into a slot in one branch of the levers a0 00, thusthrowing one branch of each lever against the segment S.

The letter Z represents a bar or lever,which is in connection with theeccentric or other part of the machine, so that an oscillating motion isimparted to it, which is communicated to the shaft to. This shaft to isprovided with a recess or shoulder, in which the end of spindie 8 rests,but so that said spindle s can'turn independently of the shaft to. Onthe shaft 20 is firmly keyed or mounted a bracket, '1, on which arepivots about which the arms It It oscillate. These arms k 76 are held incontact with the segment S by springs or weights. In

the view shown in the drawings coiled springs are shown to keep the armsk in contact with the segment S, s aid springs being applied in the samemanner as the coiled springs in connection with the levers .1: w. Whenthe lever Z receives an oscillating motion from the ec- 7o centric thismotion is communicated through the arms k kand segment S to the valve B,the parts being so combined that the valve is opened each time when thecrank is on the line of dead-center-that is, twice in one revo 7 5lotion. The connection between the lever Z and the valve B, as is seen,is not fixed; but the movement of the latter is indirectly, through thesegment S and arms k k, dependent-upon the eccentric. The segment S andarms 70 k serve to make the period ofcutting off the steam dependentupon the position of the governor, as presently described. On the shaftto, turning freely in the support I, is firmly mounted the bracket '1,with the arms k k, as already described. On the spindle s the segment Sis firmly mounted, said segment having shoulders z 2. As the arms k kare pressed onto the segment S the lever Z comes into firm connectionwith the spindle .9, imparting its oscillations, through shaft to, armsk k, shoulders z 2, segment S, and spindle s,

to the valve B; but this connection lasts for each oscillation of leverZ only so long as the. respective arm 70 or it. is in gear with segment5 S. The putting out of gear of these arms k It depends on the positionof the lever H, lying between the arms is k, and the position of whichis higher or lower, according to the movement of the governor. Thegovernor, be-

ing of any well-known construction, (weights which are caused to fly outby centrifugal force thus causing the arm 'of the lever H between thearms 70 It to descend,) receives motion in the ordinary way. Accordingas the governor mounts higher or sinks lower, the arms It It come intocontact sooner or later with the lever H, and the steam is accordinglycut olf sooner or later. If the machine goes faster, the arms k k comeinto contact sooner with the lever H, and if the machine goes slowerthey come into contact later. Whenever one of the arms 10 k thus comesinto contact with the lever H it is lifted out of gear with thecorresponding shoulder, z or z, on segment S, the segment S is forcedback to the central or closing position by the levers w w, and the valveis closed. The number of revolutions in the machine thus governs thelength of time the steam is allowed to flow in. As the arms k k strikeperpendicularly against the lever H, the latter is not inlluenced in itsrising or falling by the power requisite to overcome the tension of thesprings or weights acting on said arms lc k, and the governor has not toexercise great force. As the spindle s has its end resting in anexactly-fitting shoulder or recess, 6, thereby reducing the friction toa minimum, the variating pressure of steam for the crosssection of thestuffing-box, through which the spindle 8 passes, does not afiect theapparatus. This, in connection with the fact that the operation of thevalve B requires only a slight turning, whereby the stuffing-boxfriction of an axially-reciprocating bar is avoided, consti tutes oneoft-he advantages ofthis construction.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a governor for steam-engines, having anautomatically-variating cut-off, of an oscillating valve opening in twodirections, and provided with a spindle turning in a stuifing-box, saidspindle resting against a shoulder or support upon the end of a shafthaving an oscillating lever mounted thereon, substantially as and forthe purpose set forth.

2. In a governor apparatus, the combination, with the segment S, of armsk it, moving in a plane perpendicular to the plane of move-. ment of thegovernor-arm H, substantially as and for the purpose set forth.

3. In a governor, the combination, with an oscillating valve and spindles, of a segment,

S, levers at x, and arms k 70, substantially as and for the purpose setforth.

4. In a governor, the combination, with an oscillating valve and spindles, ofa segment, S, levers w 00, and arms 70 is, said arms k k beingoperated by a shaft, w, provided with a shoulder or recess, 2',substantially as and for the purpose set forth.

In testimony that '1 claim this as my own I have hereunto set my handand seal in the presence of two subscribing witnesses.

' PAUL GRUDELBACH. IL. s]

Witnesses BRUNO KNIFFLE,

B. ROI.

